MOULD FOR VULCANIZING AND MOULDING TIRE

Title:

MOULD FOR VULCANIZING AND MOULDING TIRE

Document Type and Number:

WIPO Patent Application WO/2019/039043

Kind Code:

A1

Abstract:

In this mould 10 for vulcanizing and moulding a tire, an annular tread mould 11 which presses a tread portion of a green tire inserted into the mould is formed by a plurality of segments 12 divided in the circumferential direction of the inserted tire. Each of the segments 12 is provided with a design surface mould 13, and a holder member 15 which holds the design surface mould 13, and transfers heat from a heating device. Each of the design surface moulds 13 comprises a plurality of piece members 14 divided in the width direction of the tire inserted into the mould. Accordingly, the formation of spews is avoided, a reduction in the temperature difference between tire shoulder portions and a portion in the centre or in the vicinity of the centre of the tread portion in the width direction of the tire during vulcanization is achieved, the difference in the property values of each region is reduced, tire performance is improved, and the workability and strength of the mould are improved.

Inventors:

ISHIHARA YASUYUKI (JP)

Application Number:

PCT/JP2018/021935

Publication Date:

February 28, 2019

Filing Date:

June 07, 2018

Export Citation:

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Assignee:

BRIDGESTONE CORP (JP)

International Classes:

B29C33/02; B29C35/02

Domestic Patent References:

WO2017068846A1

2017-04-27

Foreign References:

JP2000127173A	2000-05-09
JP2008290334A	2008-12-04
JP2006103035A	2006-04-20
JPS6072708A	1985-04-24
JPH05220753A	1993-08-31
JP2008194946A	2008-08-28
JP2009202600A	2009-09-10
JP2010201632A	2010-09-16
JP2001150441A	2001-06-05

Other References: